DE102022207739A1 - Tensioners, frame formwork and method for connecting a first and second frame formwork element - Google Patents

Abstract

Tensioner (8) for connecting a first (2) to a second frame formwork element (3), comprising: a gripper (11) with two gripping elements (12) for gripping frame parts (10) of the first (2) and second frame formwork element (3) , a coarse adjustment device (15) for the coarse adjustment of the gripping elements (12) between several coarse positions, a fine adjustment device (16) for the fine adjustment of the gripping elements (12) in one of the coarse positions, the fine adjustment device (16) having a threaded spindle (17).

Description

• einen Greifer mit zwei Greifelementen zum Umgreifen von Rahmenteilen des ersten und zweiten Rahmenschalungselements,
• eine Grobverstelleinrichtung zur Grobverstellung der Greifelemente zwischen mehreren Grobpositionen,
• eine Feinverstelleinrichtung zur Feinverstellung der Greifelemente in einer der Grobpositionen.

The invention relates to a tensioner for connecting a first to a second frame formwork element, comprising:

• a gripper with two gripping elements for gripping frame parts of the first and second frame formwork elements,
• a coarse adjustment device for the coarse adjustment of the gripping elements between several coarse positions,
• a fine adjustment device for fine adjustment of the gripping elements in one of the rough positions.

• ein erstes und ein zweites Rahmenschalungselement und
• einen Spanner.

The invention further relates to a frame formwork, comprising:

• a first and a second frame formwork element and
• a tensioner.

Finally, the invention relates to a method for connecting a first frame formwork element to a second frame formwork element of a frame formwork.

From the EP 0 553 030 A1 Such a clamping device is known for connecting two formwork elements with stiffening profiles on the back. The clamping device has a first and a second jaw, one of which can be locked in different positions and the other can be continuously adjusted with a wedge. This means that the clamping device can be easily and quickly adjusted to different distances between the jaws. This prior art thus already realizes a rough and fine adjustment of the clamping device. However, tightening the clamping device with the wedge is disadvantageous because the clamping forces cannot be precisely controlled due to the force acting on the wedge. In addition, the wedge is often difficult to remove. Another disadvantage is that hammering in the wedge leads to high levels of noise pollution, which is increasingly subject to regulatory restrictions on construction sites.

The object of the invention is to alleviate or eliminate at least individual disadvantages of the prior art. The invention's particular aim is to provide a low-noise tensioner for the connection of frame formwork elements, which can be quickly preset and tightened with as little noise as it is precise.

This object is achieved with a tensioner according to claim 1, a frame formwork according to claim 10 and a method according to claim 11. Preferred embodiments are specified in the dependent claims.

According to the invention, the fine adjustment device has a threaded spindle with which the gripping elements can be finely adjusted in one of the rough positions.

With the help of the tensioner according to the invention, the two frame formwork elements can be connected to one another in two steps. The distance between the gripping elements of the tensioner is roughly determined using the rough or quick adjustment device. The fine adjustment device is then actuated, with which the gripping elements are finely adjusted starting from the respective rough position, so that the tensioner is clamped on the frame parts of the frame formwork elements. According to the invention, the fine adjustment device has a threaded spindle. A threaded nut is connected to the threaded spindle. The distance between the gripping elements is changed by a relative rotation between the threaded spindle and the threaded nut. For this purpose, the threaded spindle or the threaded nut is connected to one of the gripping elements; the other gripping element can be connected to the coarse adjustment device. Advantageously, the fine adjustment can be carried out particularly precisely and smoothly with the threaded spindle, with no significant noise development occurring. In the prior art, threaded spindles were already known for adjusting the distance between the gripper jaws of a clamp, but the rough adjustment was missing, which meant that attaching the clamp was time-consuming. According to the invention, the advantage of the two-stage adjustment, i.e. the coarse and fine adjustment, is retained, with the threaded spindle only being used for the fine adjustment, in particular for clamping the tensioner on the frame parts of the frame formwork elements.

Depending on the version, the threaded spindle and/or the threaded nut can be rotatably mounted. In order to enable smooth, low-noise fine adjustment of the gripper, the fine adjustment device preferably has an actuating nut rotatably connected to the threaded spindle as a threaded nut. In this embodiment, the threaded spindle is arranged in a fixed manner with regard to the fine adjustment. To bring the gripping elements closer together, the actuating nut is screwed in one direction onto an external thread of the threaded spindle. Accordingly, the actuating nut is screwed in the other direction to remove the gripping elements from each other.

In a preferred embodiment, the threaded spindle is fixedly connected to a connecting element on which the gripping elements are adjustable. The threaded spindle is preferably connected to the connecting element via a joining connection, in particular via a welded connection. The gripping elements have preferred recesses in which the connecting element is arranged, preferably with a substantially precise fit, in the direction perpendicular to the fine adjustment. By turning the actuating nut, one of the gripping elements is moved along the connecting element.

A flat element, in particular a flat iron, is preferably provided as the connecting element. The flat element can have a recess in which an end section of the threaded spindle is received and fixed.

In a preferred embodiment, the actuating nut has a driver flange which is connected to at least one retaining lug of one of the gripping elements. When the actuating nut is unscrewed along the threaded spindle, the gripping element is taken along by the connection of the driver flange to the retaining lug, whereby the gripping elements are removed from one another. When screwing in the actuating nut, the actuating nut pushes the gripping element connected to it towards the other gripping element, thereby reducing the distance between the gripping elements.

In a preferred embodiment, the rough adjustment device has a guide carriage and a longitudinal guide, wherein the guide carriage can be adjusted in a release position along the longitudinal guide and can be blocked in a blocking position in one of the rough positions of the gripping elements.

For selective release and blocking of the coarse or rapid adjustment, it is advantageous if the guide carriage has a first toothing and the longitudinal guide has a second toothing, the first toothing of the guide carriage being released from the second toothing of the longitudinal guide in the release position, the first The toothing of the guide carriage in the blocking position engages with the second toothing of the longitudinal guide.

Furthermore, it is advantageous if the guide carriage has a first section with the first toothing and a second section without the first toothing, the guide carriage being displaceable between the blocking and the release position, in particular transversely to the longitudinal guide. In the blocking position, the first toothing on the first section is interlocked with the second toothing on the longitudinal guide. In the release position, the second section of the guide carriage is arranged adjacent to the second toothing of the longitudinal guide, so that the guide carriage together with the gripping element is displaceable in the longitudinal direction of the longitudinal guide.

The guide carriage preferably also has an actuating section which protrudes laterally from the longitudinal guide. The user can move the guide carriage from the blocking to the release position via the actuation section.

In order to prevent unintentional adjustment of the gripper, in a preferred embodiment the rough adjustment device has a spring element, in particular a spring clip, which presses the guide carriage in the direction of the blocking position.

The frame formwork according to the invention has a first frame formwork element and a second frame formwork element, which are connected to one another via at least one tensioner, in particular also via several tensioners, each in one of the above embodiment variants.

In a preferred embodiment, the first and second frame formwork elements each have a formwork panel, in particular made of wood, plastic or metal or a combination thereof, which is arranged on a frame, in particular made of metal. The frame has frame parts which preferably surround the formwork panel on all sides. The frame parts are preferably two longitudinal frame parts on the long sides and two transverse frame parts on the transverse sides. The longitudinal frame parts can be connected to one another via stiffening parts, in particular transverse stiffeners. The transverse stiffeners can extend essentially perpendicular to the longitudinal frame parts and/or essentially parallel to the transverse frame parts. The formwork panel has a, preferably rectangular, formwork surface with which a concrete component, in particular a wall or ceiling element, can be produced.

• Vorsehen des ersten und des zweiten Rahmenschalungselements,
• Vorsehen eines Spanners in einer der obigen Ausführungsformen,
• Umgreifen jeweils eines Rahmenteils des ersten bzw. zweiten Rahmenschalungselements mit dem Greifer des Spanners,
• Grobverstellung der Greifelemente des Spanners, so dass der Greifer in einer Grobposition am ersten und zweiten Rahmenschalungselement angeordnet ist, und
• Feinverstellung der Greifelemente ausgehend von der Grobposition.

The method according to the invention for connecting a first and a second frame formwork element of a frame formwork has at least the following steps:

• Providing the first and second frame formwork elements,
• Providing a tensioner in one of the above embodiments,
• Gripping around a frame part of the first or second frame formwork element with the gripper of the tensioner,
• Rough adjustment of the gripping elements of the tensioner, so that the gripper is arranged in a rough position on the first and second frame formwork elements, and
• Fine adjustment of the gripping elements starting from the rough position.

• Anordnen eines Ausgleichselements zwischen den Rahmenteilen des ersten und des zweiten Rahmenschalungselements vor dem Umgreifen mit dem Greifer des Spanners.

In order to be able to adapt the button to the respective application, the method preferably also has the following step:

• Arranging a compensating element between the frame parts of the first and second frame formwork elements before gripping with the gripper of the tensioner.

An elongated formwork element with a smaller width than the first and second frame formwork elements is preferably provided as a compensating element. The compensation element can be made of wood, metal, plastic or a combination thereof. The outside of the compensation element can be arranged flush with the outside of the first and second frame formwork elements in order to form a flat formwork surface to limit the receiving space for the concrete.

• 1 und 2 zeigen jeweils eine Rahmenschalung, bei welcher ein erstes und ein zweites Rahmenschalungselement samt einem dazwischen angeordneten Ausgleichselement über einen erfindungsgemäßen Spanner zusammengehalten werden.
• 3 und 4 zeigen jeweils im Detail die Verbindung über den Spanner.
• 5 zeigt einen Schnitt durch den Verbindungsbereich der Rahmenschalung.
• 6 bis 10 zeigen Details einer Grobverstelleinrichtung des Spanners.

The invention is further explained below using an exemplary embodiment shown in the drawings.

• 1 and 2 each show a frame formwork in which a first and a second frame formwork element together with a compensating element arranged between them are held together via a tensioner according to the invention.
• 3 and 4 show the connection via the tensioner in detail.
• 5 shows a section through the connection area of the frame formwork.
• 6 until 10 show details of a rough adjustment device for the tensioner.

1 shows a frame formwork 1 for concreting a concrete component, in particular a wall or ceiling element. The frame formwork 1 has a first frame formwork element 2 and a second frame formwork element 3. In the embodiment shown, the frame formwork 1 has a further frame formwork element 4. An elongated compensating element 5 is provided between the first frame formwork element 2 and the second frame formwork element 3. The outer sides of the first frame formwork element 2 and the second frame formwork element 3, in the embodiment shown also the outer sides of the compensating element 5 and the further frame formwork element 4, define a formwork surface. In the embodiment shown, a corresponding further frame formwork 6 is arranged opposite the frame formwork 1, which, together with the frame formwork 1, delimits a receiving space 7 for concrete, here to form a wall element.

How out 1 and 2 and in detail 3 and 4 As can be seen, a tensioning device, hereinafter referred to as tensioner 8, is provided, which clamps the first frame formwork element 2 together with the second frame formwork element 3 via the compensation element 5. The first frame formwork element 2 and the second frame formwork element 3 each have a rectangular frame 9 which carries a formwork panel. The frame 9 has four frame parts 10, here two longitudinal frame parts 10A and two transverse frame parts 10B. In the example shown, a longitudinal frame part 10A of the first 2 and second frame formwork element 3 rests on opposite longitudinal sides of the compensating element 5, which has a smaller width than the first 2 and the second frame formwork element 3.

The tensioner 8 has a gripper 11 with gripping elements 12, namely with a first gripping element 12A and a second gripping element 12B. The gripping elements 12 have gripping jaws 13 at the free ends, which engage in recesses 14 of the frame parts 10 when the tensioner 8 is in the clamped state of use (see 5 ).

In order to bring the tensioner 8 into the tensioned state of use 5 To bring, a coarse or quick adjustment device 15 and a fine adjustment device 16 are provided. With the help of the coarse adjustment device 15, the gripping elements 12 can be adjusted between several, in particular between a large number of, coarse positions in order to bring the gripping jaws 13 of the gripping elements 12 closer to one another to different degrees. This allows, for example, different widths of different compensation elements 5 to be compensated for. In order to transfer the tensioner 8 from the set rough position into the clamped use state, the fine adjustment device 16 is actuated, with which the gripping elements 12 can be brought closer to one another or removed from one another more finely than with the rough adjustment device 15.

In the embodiment shown, the fine adjustment device 16 has a threaded spindle 17 on which an actuating nut 18 is rotatably mounted. The threaded spindle 17 is fixed, ie immobile Lich, connected to a connecting element 19, on which the first 12A and the second gripping element 12B are each mounted so that they can be adjusted in the longitudinal direction of the connecting element 19. A flat element, here a flat iron, is provided as the connecting element 19. The gripping elements 12 have recesses 29 in which the connecting element 19 is accommodated in such a way that the gripping elements 12 can only be adjusted in the longitudinal direction of the connecting element 19, but all other movements, in particular tilting, in each case around the longitudinal direction of the connecting element 19 and around a vertical one the axis running to it are blocked. The second gripping element 12B has a passage opening as a recess 29, which is completely penetrated by the connecting element 19 in at least one rough position.

How out 3 until 5 As can be seen, the actuating nut 18 in the embodiment shown has a driver flange 20, which is designed as an annular flange. The first gripping element 12A has two retaining lugs 21, which grip the driver flange 20 at opposite locations. As a result, the first gripping element 12A is taken along when the actuating nut 18 is unscrewed.

How out 3 until 7 As can be seen, the coarse adjustment device 15 has a guide carriage 22 and a longitudinal guide 23. In the embodiment shown, the guide carriage 22 is in a receptacle 30 (cf. 4 ) of the second gripping element 12B arranged. The longitudinal guide 23 extends essentially centrally between opposite longitudinal sides of the connecting element 19. In a release position, the second gripping element 12B is displaceable together with the guide carriage 22 along the longitudinal guide 23 of the connecting element 19. In a blocking position, the second gripping element 12B is blocked together with the guide carriage 22 in one of the rough positions of the gripping elements 12, ie secured against displacement along the longitudinal guide 23 in both directions.

The guide carriage 22 has a first toothing 24 and the longitudinal guide 23 has a second toothing 25, which is shaped corresponding to the first toothing 24. The first toothing 24 of the guide carriage 22 is detached from the second toothing 25 of the longitudinal guide 23 in the release position. In contrast, the first toothing 24 of the guide carriage 22 is toothed in the blocking position with the second toothing 25 of the longitudinal guide 23. For changing between the blocking and the release position, the guide carriage 22 has a first section 26 with the first toothing 24 and a second section 27 without the first toothing 24, i.e. with smooth side surfaces, the guide carriage 22 being perpendicular to the longitudinal axis of the longitudinal guide 23 can be moved between the blocking and release positions. In addition, the coarse adjustment device 15 has a spring element 28, here a spring clip, which biases the guide carriage 22 in the direction of the blocking position.

To release the rough adjustment, the guide carriage 22 is manually pushed into the release position against the spring force of the spring element 28, whereby the engagement of the first toothing 24 of the guide carriage 22 with the second toothing 25 on the long sides of the longitudinal guide 23 is released. The second gripping element 12B can then be moved into the desired rough position. Finally, the actuating nut 18 is screwed along the threaded spindle 17 in order to bring the gripper 11 into the clamped state of use.

Reference number list:

1

Frame formwork

2

first frame formwork element

3

second frame formwork element

4

another frame formwork element

5

Compensating element

6

further frame formwork

7

Recording room

8th

Stretcher

9

Frame

10

frame parts

10A

Longitudinal frame parts

10B

Cross frame parts

11

Grabber

12

Gripping elements

12A

first gripping element

12B

second gripping element

13

gripping jaws

14

depressions

15

Coarse adjustment device

16

Fine adjustment device

17

threaded spindle

18

Actuating nut

19

connecting element

20

Driver flange

21

retaining lugs

22

Guide carriage

23

Longitudinal guidance

24

first gearing

25

second gearing

26

first section of the guide carriage

27

second section of the guide carriage

28

Spring element

29

recess

30

Recording

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 0553030 A1 [0004]

Claims (12)

Tensioner (8) for connecting a first (2) to a second frame formwork element (3), comprising: a gripper (11) with two gripping elements (12) for gripping frame parts (10) of the first (2) and second frame formwork element (3) , a coarse adjustment device (15) for the coarse adjustment of the gripping elements (12) between several coarse positions, a fine adjustment device (16) for the fine adjustment of the gripping elements (12) in one of the coarse positions, characterized in that the fine adjustment device (16) has a threaded spindle (17). tensioner (8). Claim 1 , characterized in that the fine adjustment device (16) has an actuating nut (18) rotatably connected to the threaded spindle (17). tensioner (8). Claim 2 , characterized in that the threaded spindle (17) is fixedly connected to a connecting element (19) on which the gripping elements (12) are adjustable. tensioner (8). Claim 3 , characterized in that a flat element, in particular a flat iron, is provided as the connecting element (19). Tensioner (8) according to one of the Claims 2 until 4 , characterized in that the actuating nut (18) has a driver flange (20) which is connected to at least one retaining lug (21) of one of the gripping elements (12). Tensioner (8) according to one of the Claims 1 until 5 , characterized in that the rough adjustment device (15) has a guide carriage (22) and a longitudinal guide (23), the guide carriage (22) being adjustable in a release position along the longitudinal guide (23) and in a blocking position in one of the rough positions of the gripping elements ( 12) can be blocked. tensioner (8). Claim 6 , characterized in that the guide carriage (22) has a first toothing (24) and the longitudinal guide (23) has a second toothing (25), the first toothing (24) of the guide carriage (22) being in the release position from the second toothing ( 25) of the longitudinal guide (23) is released, the first toothing (24) of the guide carriage (22) being in engagement with the second toothing (25) of the longitudinal guide (23) in the blocking position. tensioner (8). Claim 7 , characterized in that the guide carriage (22) has a first section (26) with the first toothing (24) and a second section (27) without the first toothing (24), the guide carriage (22), in particular transverse to the longitudinal guide (23), can be moved between the blocking and release positions. tensioner (8). Claim 7 or 8th , characterized in that the coarse adjustment device (15) has a spring element (28), in particular a spring clip, which presses the guide carriage (22) in the direction of the blocking position. Frame formwork (1), comprising: a first (2) and a second frame formwork element (3), a tensioner (8) according to one of Claims 1 until 9 . Method for connecting a first (2) and second frame formwork element (3) of a frame formwork (1), with the steps: providing the first (2) and the second frame formwork element (3), providing a tensioner (8) according to one of Claims 1 until 9 , Gripping around the frame parts (10) of the first (2) and second frame formwork element (3) with the gripper (11) of the tensioner (8), rough adjustment of the gripping elements (12) of the tensioner (8) so that the gripper (11) in a rough position is arranged on the first (2) and second frame formwork element (3), fine adjustment of the gripping elements (12) starting from the rough position. Procedure according to Claim 11 , characterized by : Arranging a compensating element (5) between the frame parts (10) of the first (2) and the second frame formwork element (3) before gripping with the gripper (11) of the tensioner (8).

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